Hydrogenerator



FIG. 1 is a front perspective view of a hydrogenerator;

FIG. 2 is a bottom view of the hydrogenerator;

FIG. 3 is a top view of the hydrogenerator;

FIG. 4 is a front elevation view of the hydrogenerator;

FIG. 5 is a left side view of the hydrogenerator;

FIG. 6 is a right side view of the hydrogenerator; and,

FIG. 7 is a rear elevation view of the hydrogenerator. 

The ornamental design for a hydrogenerator, as shown and described. 